package com.ticket.WechatConfig;

import com.alibaba.fastjson.JSONObject;
import io.netty.util.internal.StringUtil;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

@Component
public class HttpRequest {

    private final String AppId= "wxa8faa0b7cf15007b";
    private  final  String wxspSecret="67b16b498cdabb02a25fb64205d254e5";


    public synchronized String openid(String Code) throws Exception {
        String result = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session",
                "appid=" + AppId + //小程序APPID
                        "&secret="+ wxspSecret + //小程序秘钥
                        "&js_code="+ Code + //前端传来的code
                        "&grant_type=authorization_code");
        JSONObject jsonObject = JSONObject.parseObject(result);
        if (jsonObject.containsKey("errcode")) {
            throw new Exception("code无效");
        }
        String openId = jsonObject.get("openid").toString();
        if (StringUtil.isNullOrEmpty(openId)) {
            throw new Exception("openid为空");
        }
    return result;
    }

    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }
}
